A 24-year-old man was killed on Sunday by one or more grizzly bears while he cleaned an enclosure at a facility in Montana that provides trained animals for photographers and filmmakers, authorities said.

The man was attacked and killed at the Animals of Montana facility near Bozeman, Montana, on Sunday by one or both of the captive-bred grizzly bears in the enclosure, the Gallatin County sheriff's office said in a statement.

The company's website says that it is a "full service wildlife casting agency" which aims to provide "healthy, photogenic, well-mannered predators for the entertainment industry." It has numerous animals, including three grizzly bears.